This is a set of 32 task cards, each with a conversion problem. The conversions include both customary and metric units of length, mass, and liquid volume. Also included is a student answer sheet where students record their answer then indicate whether they got the answer right or wrong. Students can self-check by using the QR code on each card, or they can check using the answer key also included. In addition I have included a conversion chart for students to use as a resource. This is also available in a non-QR format.